Don't use DVD Shrink on something like this, when you need that much compression, your only option is a program like "DVD Rebuilder" coupled with Cinema Craft Encoder or Procoder 2. it can compress any dvd video of any size and still keep good quality.
The real problem here though is that...
Its got some kind of protection on the DVD and it won't work unless its burnt to a DOUBLE LAYER dvd+\-r!!!!
I know you'll prolly think I'm insane for saying that, but I noticed that this had actually been released a few months back and the release group had done it for a double layer disk? I don't really understand why but apparantly if you just burn it to a normal blank the game will freeze up at a certain question number